ConsFirst / Humidifiers / Compare
Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist) vs Dreo HM311S 4L Smart Humidifier
Which one has the downsides you can live with?
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The short answer
Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist) ranks higher (#1 vs #2 of 8) and scores better on humidifying power, quietness, tank & runtime. Dreo HM311S 4L Smart Humidifier wins on easy cleaning, durability.
The biggest complaint about the Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist) is breaks or cracks within a season or two; for the Dreo HM311S 4L Smart Humidifier it's leaks and cracked tanks. Pick the one whose catch bothers you less.
Side by side
| Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist) | Dreo HM311S 4L Smart Humidifier | |
|---|---|---|
| Rank in humidifiers | #1 | #2 |
| Price tier | $$ | $ |
| Type | Ultrasonic | Ultrasonic |
| Amazon 1–2★ share | 11% | 10% |
| Overall score | 3.8 | 3.7 |
| Humidifying power | 5.0 | 3.5 |
| Easy cleaning | 3.5 | 4.5 |
| Quietness | 4.5 | 4.0 |
| Tank & runtime | 4.0 | 3.5 |
| Running cost | 3.5 | 3.5 |
| Durability | 2.5 | 3.0 |
Price tiers: $ under $60 · $$ $60–150 · $$$ over $150. Highlighted = clearly better (a score gap of 0.3 or more, or a 1–2★ share at least 3 points lower). Scores are explained, with sources, on each product's page.
Top complaints
Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist)
- Breaks or cracks within a season or two
Reliability and durability are negative aspects in Amazon's review summary (durability: 101 of 142 mentions negative), with owners describing units that stopped working, tanks that cracked and leaked, and units that broke after about 1.5 years.
- Humidity control gets erratic over time
Wirecutter's tests found the auto mode accurate, but it has heard from readers, staff and Amazon reviewers that the humidity reading becomes unreliable over time. Resetting the unit (hold power for 15 seconds) often helps. Amazon's summary calls humidity output mixed, with some owners saying no mist comes out at all.
- White dust and a fiddly base
Wirecutter warns that, like other ultrasonics, it can leave a trail of fine mineral dust unless you use distilled or filtered water, and the base has nooks that are annoying to clean. Amazon owners are split on cleaning, with some saying there are too many parts to take apart.
- Warm mist runs dangerously hot
Wirecutter notes the warm-mist heating element can get dangerously hot and cites the Mayo Clinic's advice against warm-mist models in homes with children. It also recommends skipping the essential-oil tray.
Source: Wirecutter
Dreo HM311S 4L Smart Humidifier
- Leaks and cracked tanks
Leakage (200 of 227 mentions) and durability (179 of 229) are negative aspects on Amazon. Owners report water leaking from the bottom, units breaking within two months, and cracked tanks.
- Feels less sturdy; small tank without a handle
Wirecutter says the construction doesn't feel as durable as its other picks, the 4 L tank is smaller than they'd like, and it has no carrying handle.
Source: Wirecutter - White residue with tap water
Wirecutter says to use distilled or filtered water, since minerals in tap water can leave white residue or particulate matter in the air.
Source: Wirecutter - Not the quietest
CNN Underscored measured an average of 34 dB and called it not as quiet as others it tested. It also has no on-unit sleep-mode button.
Source: CNN Underscored
Who should pick which
Pick the Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist) if
Medium to large rooms
People who want warm and cool mist in one unit
Smart-home control and auto humidity
Skip it if: You won't buy distilled water; You have small children (warm-mist mode gets very hot); You want a unit that reliably lasts many seasons
Pick the Dreo HM311S 4L Smart Humidifier if
Bedrooms and nurseries up to about 300 sq ft
Tight budgets that still want auto mode and an app
Easy cleaning
Skip it if: You need to humidify a large room; Light sleepers who want near-silence; You won't use distilled water
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